Calculating-machine.



G. A. MEILIGKE.

CALCULATING MACHINE.

APPLICATION FILED MAR. 27, 1908.

Patented Dec. 21, 1909.

5 BHEETSBHEET 1.

0. A. MEILIGKE CALCULATING MACHINE. APPLICATION FILED MAR. 27, 1908.

943,984.-v Patented Dec. 21, 1909.

5 SHEBTSSHEET 2.

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INUENTOR QQRMALM C. A. MEILIGKE.

GALCULATING MACHINE.-

APPLICATION FILED MAR. 27, 1908.

G. A.' MEILIUKE.

CALCULATING MACHINE.

APPLICATION FILED MAR. 27, 1902.

5 SHEETS-SHEET 4.

AeiwnNvfl R g g; Q \JJITNE 5E5 INUENTOR G. A. MEILIGKE. CALCULATINGMACHINE.

APPLICATION FILED MAR. 27, 1908.

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CARL ARNO MEILICKE, 0F HANLEY, SASKATCHEWAN, CANADA.

CALCULATING-MACHINE.

[0 on whom it may concern:

Be it known that I, CARL AnNo MEILICKE, of the town of Hanley, in theProvince of Saskatchewan, Canada, have invented certain new and usefulImprovements in Calculating-Machines, ofwhich the following is theinvention.

My invention relates to improvements in calculating machines, and theobject of the invention is to produce a simple mechanism which willenable charges or accounts of different kinds to be easily computed.

The invention is especially applicable in computing the number of daysfrom one date to another, either past or future, and in finding theinterest on a note for the given number of days.

The invention consists in the construction and combination of parts tobe described more fully hereinafter and definitely set forth in theclaim.

Figure 1 is a plan view of the machine. Fig. 2 is a vertical crosssectional view through the. machine, the section being taken in theplane denoted by the line X X, Fig. 1. Fig. 3 is a longitudinal verticalsectional view of the machine, certain parts being shown in sideelevation. Fig. 4 represents a portion of the chart carried by the drum,also aset of calendars which cooperate therewith. Fig. 5 is a verticalsectional view through the casing in the plane, denoted by the line Y, Yon Fig. 3 and looking in the direction of the arrow. Fig. 6 is a similarView to that shown in Fig. 5, but looking in the reverse direction.

In thedrawings like characters of reference indicate corresponding partsin each figure.

Referring more particularly to the parts, 1 represents ahorizontalsupportsuch as a table, desk, or shelf.

2 represents a rectangular-shaped casing which has its base suitablyformed at 3 to rest on the desk.' The upper part or face at of thecasing inclines slightly to the plane of the desk in order that the facemay be more easily seen by a person when sitting at the desk.

5 is an elongated slot or sight opening which passes both centrally andlimgitudi 1 nally across the face 4 of the casing.

6 is a transparent plate of material such Specification of LettersPatent.

Application filed March 27, 1908. Serial No. 423,758.

Patented Dec. 21, 1909.

as glass having its edges beveled at 7 and fitting in the casing face.

8 and 9 are a set of brackets or hangers fastened to. the-under side ofthe desk, one at either side. port for a horizontal shaft 10 which isfree also to turn in bearings formed in the hangers.

11 is a thumb head having its shank 12 passing throughthe side wall ofthe casing 52. v The end of the shank or is journaled in a plate 18which is fastened at 1 1 to the inner side of the casing face. The plateis parallel with the side wall'through which the shank enters.

15 is a gear wheel on the shank between the plate and the casing wall,and such wheel turns with the shank. 16 is a second gear wheelimmediately beneath and meshing with the latter gear wheel, and it issupported by a pin shaft 17 passing between the plate and the casingwall. This latter gear 18 free to rotate on its shaft and is simply anidler.

18 is a second plate centered at its one end on the shaft 10 and havingits other end connected by a pin shaft 19 "to the hanger 9, such pinshaft supporting a gear wheel 20, which is adapted to mesh with the gearwheel 16'.

21 is a gear wheel on the main shaft 10 and in mesh with the wheel 20.

lVith the constructionl have shown it is possible to lift the casing 2from the desk it being only necessary when replacing it to have thegears 16 and 20 mesh the one with the other. if the casing were madestationary with the desk top then it would be unnecessary to have thetwo one in such case being sufficient.

22 a disk wheel centered on the shaft 10 and with its hub 23 restingagainst the plates 18. The wheel has a peripheral flange 2t to the sidewhich is toward the thumb wheel. The radius of the disk wheel ispractically the distance from the center of the shaft 10 to the sightopening, or in other words the disk wheel in its rotation just passesbeneath the upper face i at the sight opening. The disk wheel is free tor0- tate on the shaft 10 and has arranged on its face a calendar strip 2which will shortly be explained.

These hangers form the supplates 13 and 18, y

and immediately adjacent on the face of the 26 is an opening passingthrough the glass plate 6 and the face l of the casing. The flange 24 onthe disk wheel passes immediately beneath the opening in such a mannerthat if the finger or thumb be inserted the motion of the wheel can be ll l stopped at will.

27 is a drum of cylindrical form rigidly fastened to the shaft 10 bymeans of radial ribs or spokes 28 passing to hubs 29 which in turn areconnected to the shaft. The diameter of the drum is the same as that ofthe body of the disk wheel already de scribed, and the drum ispositioned on the shaft immediately to the side of the disk wheel. Inthis way the plate 18, and one of the hubs, 29 prevent the disk. wheelfrom having longitudinal movement or play on the shaft. The ends of thedrum are toothed completely around as at 30 and 31 disk wheel 22 is aspring 32. The spring 1s fastened securely to the disk and designed tohave its free end play on the teeth of the drum.

In the drawing (Fig. 3) it is seen that the spring 32 operates on onlyhalf the length of each tooth, and that directly above it there is asecond spring 33 fastened permanently to the under side of the face 4:of the casing and which has its free end operating on the other half. Inthis way the drum and disk wheel can be rotated together orindividually, for if there be no pressure applied on the face of thedisk wheel through the opening 26 then the spring will cause the drum tocarry the wheel, with it. If pressure be applied through the opening thedrum can be rotated separately as the l spring 32 will pass or clickover the teeth. 1 The spring 33 prevents the drum in all cases fromstopping in rotation irregularly and it also retards its motion whenbeing rotated; in this way making it a great dea easier to stop at adefinite position.

34: is a chart on the drum which will be described more fullyhereinafter.

35 is a complementary disk wheel to that of 22 and at the opposite endof. the drum, and it is su plied with a peripheral flange 36 at the si eaway from the drum, in the same manner .as the other. The hub 37 of thewheel is free to rotate on the'shaft 10 and is prevented fromlongitudinal displacement on the shaft by the other adjoining i hub '29of the drum, and the hanger 8. i 38 is a spring corresponding to thespring l 32 and it has its one end fastened securely at 39 to the sideof the disk wheel 35 adjacent to the drum. The other or free endoperates on the teeth 31 of the drum in the same manner as does thespring 32 on the teeth 30. i to is a calendar strip fastened on the faceof the disk wheel and it is formed. as later i described. i

gether or separately, as,

or thumb can be easily placed on the'i'lange from above. This latteropening corresponds with the opening 26.

On account of the spring 38 I can rotate the drum and the disk wheel 35either toif no pressure be applied to the surface of the wheel throughthe opening il the wheel will necessarily rotate with the drum when itis rotated. If pressure he applied the spring will simply pass or clickover the teeth.

, i2 is a strip of paper or other such material placed immediatelybeneath the plate 6, and 43 is a longitudinal slot cut'in the paper, theslot registering with the sight opening already described. Directlyabove the slot is a computed interest table 44 and below is a secondtable 45. These two tables are absolutely the same as the tables carriedon the plate (22) which I have described in a concurrent patentapplication for an improvement in calculating machines, dated the 4thday of February, 1908. At the end of the lower table 45 I have placedthe words Date and Days each in a column which passes across the table.

The interest chart on the drum is computed in absolutely the same manneras a certain chart (28) which I have already described minutely in thespecification in which I have explained the tables on the plate (25)above referred to. An addition however is made on the chart in that asecond set of numbers 1, 2, 3,to 364 has been placed at I the oppositeside, as will appear if reference be made to Fig. 4:, where it will beseen there are two boundary columns, each bearing the numbers abovereferred to. This additional feature however is not absolutely necessaryas it is only used as a convenience for reading.

The calendar strip 25 is as now described. On the strip are arranged themonths of the year successively in a longitudinal column 46 and directlyto the side of this latter column and toward the drum is a second column47 which has the days of the month notatcd thereon. The months appear inwhat might be termed a clock-wise rotation, and the numbers representingthe days of the month progress also in the same rotation.

The calendar strip 40 is of the same form as that 25 save that it ispractically. reversed. There are two longitudinal columns 1 48 and 49respectively, that 48 being first from the drum and bearing the names ofthe months of the year in rotation. However in this case the months arearranged beginning with January, in what might be termed (in respect tothe other strip 25) a counter clock-wise rotation. In the column ltlf)ROXY givean QXZLIHplG.

49 the days of each month are notated directly opposite the months-towhich they belong and the 'ilumbers representing the days progress in acounter clock-wise rotation as to the other strip.

I have in this case, as I had in the application above referred to, avacant longitud'inal row on the drum chart, which when counted with theother three hundred and sixty-four rbws, gives altogether three hundredand siXty-five longitudinal rows on the drum. For this reason'it will beseen that there is a row on the drum corresponding to each date 011 thedisk wheels as there are three hundred and sixty-five days in the year.In order that the manner of making calculation may be better understoodI will In order to avoid prolixity I will take the same examples as weregiven in theispecification of the other application already referred toin which it was required to compute the interest on a note which matureson December 30th; the present date being considered. as J anuary the3rd.

My first operation is to turn the thumb head 11 which will rotate thedrum. The drum on account of the spring 32 will carry the disk 25 withit, and I keep on turning until the present date, 2'. 6., JanuaryBrd,appears through the sight opening. As soon asit appears the finger isplaced on the disk through the opening 26 and it is held; the drum beingrotated till the blank longitudinal row appears through the sightopening opposite the present date. This state or position of the diskand drum is shown in Fig. 4 of the drawings.

The next operationis to release the pressure of the finger on the diskand to allow both the disk and drum to rotate together, continuing therotation until the date on which the note matures (December 30th)appears throughrthe sight opening. Directly opposite this date'on thedrum are found the figures 361, and this is the number of days froifiJanuary the 3rd to December the 30th, of the present year.

Having found the number of days the next operation is to find theinterest for the number of days'at whatever therate of per cent. in anyarticular case may be. The computation rom this point the same as in my'othermachine- If the interest be stated at five per cent, and theamount of the note be two hundred dollars, we simply look on the lowertable 45, and we find the 'rate of interest 5% -also a number 7 1 200,and-directly above 200 on the drum appears a number 9.89 This is theinterest on $200.00, for 361 days at 5%. Consequently, as before, theamount necessary to meet the note when, it matures will be $209.89.

In order to compute both the time and interest on a note which hasmatured I do it by means of the second calendar strip 42.

As an example, suppose the note was taken on February 2nd of last year,and matures on January 29th of this year, which is taken .is1i1serted-through the opening ll and the disk is prevented from rotatingby finger pressure. The drum is rotated till the blank row on the chartappears in the sight opening, as before, and then the finger pressurebeing released both drum and disk are rotated till the date F ebruary,2nd, appears through the sight opening. Directly opposite this latterdate on the drum appears in the first column the figures 361?, whichrepresent the number of'days between the dates given. 1

The manner in which the interest is c0m puted on any amount for thisnumber of days isthe same as has been just described. in the otherexample.

What I claim as my invention is:

In a machine of the class described, the combination with a horizontalsupport, of a rectangular casing formed with an open bottom and having alongitudinal slot in its face; a set of hangers fastened .to andextending downwardly from the support; a drum having a tabulated chartthereon mounted on a..horizontal shaft carried by the hangers, the endsof the' drum being toothed, a thumb head having a shank ing into andthrough the casing, a train of gears inter-connecting the thmnb headshank; with the drumshaft', a set of disk wheels rotatably mounted onthe drum shaft, one

at each end of the drum; said wheels having each a calendar stripthereon adapted to cooperate with the drum chart; a 9 ring fastened tothe face of thedisk whee s ad-, jacent the drum, the said. springs beingadapted to have their free end operate on CARL ARNO MEILICKE.

\Vitnesses 0. HAINES, R. (lonAiN.

